In order to check which Elixir version one is currently using, you could use -
Either
a.
elixir --version
or
b.
elixir -v
Both options mentioned above give the same result as shown below -
➜ ~ elixir --version
Erlang/OTP 19 [erts-8.2] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]
Elixir 1.4.0
➜ ~ elixir -v
Erlang/OTP 19 [erts-8.2] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]
Elixir 1.4.0